Double-acting grinding pan-mill and amalgamator.



C. D. TREGONNG.

DOUBLE ACTING GHINDING PN MILL ANDYAMALGAMATOR. APPLICATION man 001.28. |915.

LUQ. Patened June 13, 1916.

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DOUBLEv ACTING GRINDING PAN MILL AND AMALGANIATOR. APPucATloN FILED o1.28. 1915.

1,186,709., Patented Jun@ 13, 1916.

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CHARLES :envar rnneonrnc, or ennss verter, CALIFORNIA.`

DOUBLE-ACTING GRINDING PAN-MILL AND AMLGAMAToR.

Spccincation of Letters Patent.

Patented June 13, 1916.

Application filed October 28, 1915.. Serial No. 58,417'.

tain new and useful improvements in Double-Acting Grinding Pan-Mills andl Amalga-- mators; and 1, do declare the following to be a full, clear, andl exact description of the l invention,'such as -will enable others skilled in the art to which it appertains to make and useA the same.

This invention relates to ore pulverizing machines and more particularly to what. are

known as pan mills. v

The object of the invention is to provide..v

a machine of this character which while simple in construction will eihcaciously relgrind coarse sand toany desired ineness.

Another object is to provide a machinefof this, character constructed to prevent wear on the intermeshing gear wheels employed for,

grinding and which is equipped with imal proved` means for holding the gears in operative position.

Still another object is to provide improved driving means for a machine of this character so arranged as to prevent o-il or grease" from dropping into the mill.

With these and other objects in view, the invention consists ofcertain novel features of construction, and the combination and arrangement ofparts as will be hereinafter more fully described and claimed.

In the accompanying drawings: Figure 1 represents a vertical section of a mill constructed in accordance with this invention; Fig. 2 is a horizontal section thereof taken on the' line 2-2 of Fig. 1; Fig. is a hori- Zontal section taken'on the line .3f-3 of Fig. 1; Fig. 4 is a detail vertical section taken on the line 4.-4: of Fig. 2. Fig. 5 is adetail side elevation of one of the disks and the p gear carried thereby shown in section; Fig. 6 isa top plan view of the disks; Fig. 7 is a bottom plan view thereof.

In the embodiment illustrated a. supporting base 1 is shown having a frame 2 disposed thereabove and supported by uprights 3 rising fromsaid base 1. A. grinding pan 5 is mounted on the frame 2 and secured thereto byany suitable mea-ns. As shown this pan 5 has a reduced cylindrical lower portion 6 in which are mounted a 'bed plate/7 and a plurality of rindingdisks 8, the combined thickness c' the grinding disks and the bed plate substantially filling this reduced portion 6 of the pan, as is shown clearlyin Fig. 1. The reduced portion 6 of' the pan connects with the larger upper portlon thereof by an inclined seat or. wall 9 on which rests an annular internally ltoothed ring 10 which is designed for engaging the "teeth of a plurality of gears 11 which are carried by the disksl'S each of saiddisks having an upstanding angular standard 12 at its center which projects ,through'each gearv 11 carried thereby and thus holds the gears and disks in assembled relation yso that they will turn together on'revolving of the gears.

Five of these gears are herein-shown, Ione being arranged centrally and indicated at 11 and with which the other four gears mesh andre'ceive rotary motion therefrom; This central gear 11 has a central opening through which projectsan upright driving shaft lwhich is mounted at one end. in a suitable bearing 14 secured tothe base plate 1 and at its other end inthe cross bar 15 of any inverted U-shaped brace which is con- -nected atv its opposite vends to theopposite sides of the' pan 5 and is herein shown bolted thereto. Thiscentral gear 11 has an up-y wardly extending tubular sleeve 16 provided with a clutchmember 17 which isdesigned to be engaged by a eoperating clutch member 18 keyedto the shaft 13 and by means of Which rotary motion is imparted to the central gear 11. This upright driving shaft 13 as herein shown is driven by means of a horizontally disposed-shaft 19 on which'is mounted a beveled gear 20 which meshes with a similar shaped gear 21 carried by the vshaft 13. This shaft 19 is provided'with which the ore and water are drawn after the ore is pulverized The, mouth of the spout 24 is provided with a gate or slide valve 25n the height of which controls lthe overflow of the water andere from the pan, it being of vcourse understood-that the height of this gate may be' varied to suit theV Wishes of the operator.

` The bed plate 7 is preferably provided llt with a plurality of -grooves 7"' similar to those of ka mill-stone.- and the disks 8v are' similarly'provided ontheir lower faces with.

grooves v8*-fourroi which are herein 'shown arranged, at diametrically oppositev pointsl although it is to beunderstoodthat-any desired' numberv may be employed and they may be arranged vin any desired or suitable manner, f ,fj 4,

*From the above descriptioniit. will beobvious thatthe central gear ll-when clutched to 'the shaft 13' will be rotated by said shaft .and the other gears'll'` which mesh with the central gear will be rotated by said lcentral' gear and turnedin 'a direction opposite to that in which thecentral gear'turns. These gears 1l are kept in proper alinementbythe teeth of the ring 4l0 which mesh with the' ears 4are thus prevented from gears l1. The being worn an when the machine. is in .operation -they will revolve upon their own axes and also around the central gear thereby producing avery efiifeient pulverizing effect on the material to be ground which is disposed between the' lowerfaces of the disks S and the upper face of the bed vplate 7.

The partiallycrushed ore and water may be introduced into the pan through any suitable means not shown.

Whenv it is desired to`clean the machine, the loose gearsare removed together with the disks on which they aremounted, the

sliding gate valve25 is raised andthe powdered.y ore f scraped out through the spout 24.,

y /While tive gears are shown in'thel 'accompanying drawings as being a convenient number it isnotdesired to limit the invention to that number as` any numberfinay be employed' that may berfound useful. 4'

The bed plate 7 is shown provided at diametrically opposite points with radially eX'- tending apertured ears 7'* which are designed to receive fastening elements for seon said bed plate, afcentral gear arranged curing the plate to the bottom of the panll As shown the bottom .of the pan 5 has a central opening therein for the passage of the shaft 13 and said opening is surrounded ing or mounting each of the gears l1 on an' individual driving disk 8 wear on these gears will be prevented, the wearing effect taking place between the lupper :tace of the bedh plate 7 and the lower, face of these disks and when the'di'sks become worn so as to render them unfit for luse they may be quickly and readily removed and others substituted in mounting the Shaftl andthe drivingniechanism shaft below the pan 5l all grease and oil is prevented from dropping into the pan as ordinarily occurs when the shaft driving mechanism `is located above the pan.

' -I claim as my invention:

l. In an ore pulverizing machine the combination of an ore receivin' pan, a bed plate mounted in the bottom tiereof, grinding disks mounted to revolve flatwise on said bed plate, a central gear arranged therein, a plurality of gears mounted on and fixed to Vsaid 'disks and surrounding and meshing with said central gear, and means for rotal ing said' central gear.l

' 2. In an ore pulverizing machine the combination of an ore receiving pan, a bed plate mounted in the bottom thereof, grinding disks mounted to revolve flatwise on said bed plate, a centralv gear arranged therein, a plurality .of gears mounted on and detachably engaged with said disks, means for maintaining said gears in operative position, and means for rotating said central gear.

3. In an ore pulveriz'ing machine the combiriation of an ore receiving pan, a bed plate mounted in the bottoni thereof, grinding disks mounted to revolve fiatwise on said bed plate, a central gear arranged therein` a plurality of gears mounted on and detachably engaged with said disks, means for maintaining'said gears in operative position,r and means extending* through the bottomA of the pan for rotating said central gear.

4. In anv ore pulverizing machine the combination of van ore receiving pan, a

v*bed plate mounted in the bottom thereof,

grinding disks mounted to revolve latwise therein, .a plurality of gears mounted on and detachably engaged with said disks,

means for maintaining said gears in opera- CHARLES nAvEvfrnaeoNiNG,

Y Witnesses:

WILLIAM S. MAY, OSCAR L. CorLiN.

l y copies of this pnteiitmay b e obtainen torvve cents each, by addressing 'the fommireer 0.! retentir, Wuhmgtemnw,

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